1 /******************************************************************************
2 *
3 * Copyright (C) 2001-2012 Broadcom Corporation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 ******************************************************************************/
18
19 /******************************************************************************
20 *
21 * this file contains the main BNEP functions
22 *
23 ******************************************************************************/
24
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include "bt_target.h"
29
30 #include "bt_common.h"
31 #include "bt_types.h"
32 #include "hcidefs.h"
33 #include "hcimsgs.h"
34
35 #include "l2c_api.h"
36 #include "l2cdefs.h"
37
38 #include "btm_api.h"
39 #include "btu.h"
40
41 #include "bnep_api.h"
42 #include "bnep_int.h"
43 #include "bt_utils.h"
44
45 #include "device/include/controller.h"
46 #include "osi/include/osi.h"
47
48 extern fixed_queue_t* btu_general_alarm_queue;
49
50 /******************************************************************************/
51 /* G L O B A L B N E P D A T A */
52 /******************************************************************************/
53 tBNEP_CB bnep_cb;
54
55 const uint16_t bnep_frame_hdr_sizes[] = {14, 1, 2, 8, 8};
56
57 /******************************************************************************/
58 /* L O C A L F U N C T I O N P R O T O T Y P E S */
59 /******************************************************************************/
60 static void bnep_connect_ind(BD_ADDR bd_addr, uint16_t l2cap_cid, uint16_t psm,
61 uint8_t l2cap_id);
62 static void bnep_connect_cfm(uint16_t l2cap_cid, uint16_t result);
63 static void bnep_config_ind(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg);
64 static void bnep_config_cfm(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg);
65 static void bnep_disconnect_ind(uint16_t l2cap_cid, bool ack_needed);
66 static void bnep_disconnect_cfm(uint16_t l2cap_cid, uint16_t result);
67 static void bnep_data_ind(uint16_t l2cap_cid, BT_HDR* p_msg);
68 static void bnep_congestion_ind(uint16_t lcid, bool is_congested);
69
70 /*******************************************************************************
71 *
72 * Function bnep_register_with_l2cap
73 *
74 * Description This function registers BNEP PSM with L2CAP
75 *
76 * Returns void
77 *
78 ******************************************************************************/
bnep_register_with_l2cap(void)79 tBNEP_RESULT bnep_register_with_l2cap(void) {
80 /* Initialize the L2CAP configuration. We only care about MTU and flush */
81 memset(&bnep_cb.l2cap_my_cfg, 0, sizeof(tL2CAP_CFG_INFO));
82
83 bnep_cb.l2cap_my_cfg.mtu_present = true;
84 bnep_cb.l2cap_my_cfg.mtu = BNEP_MTU_SIZE;
85 bnep_cb.l2cap_my_cfg.flush_to_present = true;
86 bnep_cb.l2cap_my_cfg.flush_to = BNEP_FLUSH_TO;
87
88 bnep_cb.reg_info.pL2CA_ConnectInd_Cb = bnep_connect_ind;
89 bnep_cb.reg_info.pL2CA_ConnectCfm_Cb = bnep_connect_cfm;
90 bnep_cb.reg_info.pL2CA_ConfigInd_Cb = bnep_config_ind;
91 bnep_cb.reg_info.pL2CA_ConfigCfm_Cb = bnep_config_cfm;
92 bnep_cb.reg_info.pL2CA_DisconnectInd_Cb = bnep_disconnect_ind;
93 bnep_cb.reg_info.pL2CA_DisconnectCfm_Cb = bnep_disconnect_cfm;
94 bnep_cb.reg_info.pL2CA_DataInd_Cb = bnep_data_ind;
95 bnep_cb.reg_info.pL2CA_CongestionStatus_Cb = bnep_congestion_ind;
96
97 /* Now, register with L2CAP */
98 if (!L2CA_Register(BT_PSM_BNEP, &bnep_cb.reg_info)) {
99 BNEP_TRACE_ERROR("BNEP - Registration failed");
100 return BNEP_SECURITY_FAIL;
101 }
102
103 return BNEP_SUCCESS;
104 }
105
106 /*******************************************************************************
107 *
108 * Function bnep_connect_ind
109 *
110 * Description This function handles an inbound connection indication
111 * from L2CAP. This is the case where we are acting as a
112 * server.
113 *
114 * Returns void
115 *
116 ******************************************************************************/
bnep_connect_ind(BD_ADDR bd_addr,uint16_t l2cap_cid,UNUSED_ATTR uint16_t psm,uint8_t l2cap_id)117 static void bnep_connect_ind(BD_ADDR bd_addr, uint16_t l2cap_cid,
118 UNUSED_ATTR uint16_t psm, uint8_t l2cap_id) {
119 tBNEP_CONN* p_bcb = bnepu_find_bcb_by_bd_addr(bd_addr);
120
121 /* If we are not acting as server, or already have a connection, or have */
122 /* no more resources to handle the connection, reject the connection. */
123 if (!(bnep_cb.profile_registered) || (p_bcb) ||
124 ((p_bcb = bnepu_allocate_bcb(bd_addr)) == NULL)) {
125 L2CA_ConnectRsp(bd_addr, l2cap_id, l2cap_cid, L2CAP_CONN_NO_PSM, 0);
126 return;
127 }
128
129 /* Transition to the next appropriate state, waiting for config setup. */
130 p_bcb->con_state = BNEP_STATE_CFG_SETUP;
131
132 /* Save the L2CAP Channel ID. */
133 p_bcb->l2cap_cid = l2cap_cid;
134
135 /* Send response to the L2CAP layer. */
136 L2CA_ConnectRsp(bd_addr, l2cap_id, l2cap_cid, L2CAP_CONN_OK, L2CAP_CONN_OK);
137
138 /* Send a Configuration Request. */
139 L2CA_ConfigReq(l2cap_cid, &bnep_cb.l2cap_my_cfg);
140
141 /* Start timer waiting for config setup */
142 alarm_set_on_queue(p_bcb->conn_timer, BNEP_CONN_TIMEOUT_MS,
143 bnep_conn_timer_timeout, p_bcb, btu_general_alarm_queue);
144
145 BNEP_TRACE_EVENT("BNEP - Rcvd L2CAP conn ind, CID: 0x%x", p_bcb->l2cap_cid);
146 }
147
148 /*******************************************************************************
149 *
150 * Function bnep_connect_cfm
151 *
152 * Description This function handles the connect confirm events
153 * from L2CAP. This is the case when we are acting as a
154 * client and have sent a connect request.
155 *
156 * Returns void
157 *
158 ******************************************************************************/
bnep_connect_cfm(uint16_t l2cap_cid,uint16_t result)159 static void bnep_connect_cfm(uint16_t l2cap_cid, uint16_t result) {
160 tBNEP_CONN* p_bcb;
161
162 /* Find CCB based on CID */
163 p_bcb = bnepu_find_bcb_by_cid(l2cap_cid);
164 if (p_bcb == NULL) {
165 BNEP_TRACE_WARNING("BNEP - Rcvd conn cnf for unknown CID 0x%x", l2cap_cid);
166 return;
167 }
168
169 /* If the connection response contains success status, then */
170 /* Transition to the next state and startup the timer. */
171 if ((result == L2CAP_CONN_OK) &&
172 (p_bcb->con_state == BNEP_STATE_CONN_START)) {
173 p_bcb->con_state = BNEP_STATE_CFG_SETUP;
174
175 /* Send a Configuration Request. */
176 L2CA_ConfigReq(l2cap_cid, &bnep_cb.l2cap_my_cfg);
177
178 /* Start timer waiting for config results */
179 alarm_set_on_queue(p_bcb->conn_timer, BNEP_CONN_TIMEOUT_MS,
180 bnep_conn_timer_timeout, p_bcb, btu_general_alarm_queue);
181
182 BNEP_TRACE_EVENT("BNEP - got conn cnf, sent cfg req, CID: 0x%x",
183 p_bcb->l2cap_cid);
184 } else {
185 BNEP_TRACE_WARNING("BNEP - Rcvd conn cnf with error: 0x%x CID 0x%x",
186 result, p_bcb->l2cap_cid);
187
188 /* Tell the upper layer, if he has a callback */
189 if (bnep_cb.p_conn_state_cb && p_bcb->con_flags & BNEP_FLAGS_IS_ORIG) {
190 (*bnep_cb.p_conn_state_cb)(p_bcb->handle, p_bcb->rem_bda,
191 BNEP_CONN_FAILED, false);
192 }
193
194 bnepu_release_bcb(p_bcb);
195 }
196 }
197
198 /*******************************************************************************
199 *
200 * Function bnep_config_ind
201 *
202 * Description This function processes the L2CAP configuration indication
203 * event.
204 *
205 * Returns void
206 *
207 ******************************************************************************/
bnep_config_ind(uint16_t l2cap_cid,tL2CAP_CFG_INFO * p_cfg)208 static void bnep_config_ind(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg) {
209 tBNEP_CONN* p_bcb;
210 uint16_t result, mtu = 0;
211
212 /* Find CCB based on CID */
213 p_bcb = bnepu_find_bcb_by_cid(l2cap_cid);
214 if (p_bcb == NULL) {
215 BNEP_TRACE_WARNING("BNEP - Rcvd L2CAP cfg ind, unknown CID: 0x%x",
216 l2cap_cid);
217 return;
218 }
219
220 BNEP_TRACE_EVENT("BNEP - Rcvd cfg ind, CID: 0x%x", l2cap_cid);
221
222 /* Remember the remote MTU size */
223 if ((!p_cfg->mtu_present) || (p_cfg->mtu < BNEP_MIN_MTU_SIZE)) {
224 mtu = p_cfg->mtu;
225 p_cfg->flush_to_present = false;
226 p_cfg->mtu_present = true;
227 p_cfg->mtu = BNEP_MIN_MTU_SIZE;
228 p_cfg->result = result = L2CAP_CFG_UNACCEPTABLE_PARAMS;
229 } else {
230 if (p_cfg->mtu > BNEP_MTU_SIZE)
231 p_bcb->rem_mtu_size = BNEP_MTU_SIZE;
232 else
233 p_bcb->rem_mtu_size = p_cfg->mtu;
234
235 /* For now, always accept configuration from the other side */
236 p_cfg->flush_to_present = false;
237 p_cfg->mtu_present = false;
238 p_cfg->result = result = L2CAP_CFG_OK;
239 }
240
241 L2CA_ConfigRsp(l2cap_cid, p_cfg);
242
243 if (result != L2CAP_CFG_OK) {
244 BNEP_TRACE_EVENT("BNEP - Rcvd cfg ind with bad MTU %d, CID: 0x%x", mtu,
245 l2cap_cid);
246 return;
247 }
248
249 p_bcb->con_flags |= BNEP_FLAGS_HIS_CFG_DONE;
250
251 if (p_bcb->con_flags & BNEP_FLAGS_MY_CFG_DONE) {
252 p_bcb->con_state = BNEP_STATE_SEC_CHECKING;
253
254 /* Start timer waiting for setup or response */
255 alarm_set_on_queue(p_bcb->conn_timer, BNEP_HOST_TIMEOUT_MS,
256 bnep_conn_timer_timeout, p_bcb, btu_general_alarm_queue);
257
258 if (p_bcb->con_flags & BNEP_FLAGS_IS_ORIG) {
259 btm_sec_mx_access_request(
260 p_bcb->rem_bda, BT_PSM_BNEP, true, BTM_SEC_PROTO_BNEP,
261 bnep_get_uuid32(&(p_bcb->src_uuid)), &bnep_sec_check_complete, p_bcb);
262 }
263 }
264 }
265
266 /*******************************************************************************
267 *
268 * Function bnep_config_cfm
269 *
270 * Description This function processes the L2CAP configuration confirmation
271 * event.
272 *
273 * Returns void
274 *
275 ******************************************************************************/
bnep_config_cfm(uint16_t l2cap_cid,tL2CAP_CFG_INFO * p_cfg)276 static void bnep_config_cfm(uint16_t l2cap_cid, tL2CAP_CFG_INFO* p_cfg) {
277 tBNEP_CONN* p_bcb;
278
279 BNEP_TRACE_EVENT("BNEP - Rcvd cfg cfm, CID: 0x%x Result: %d", l2cap_cid,
280 p_cfg->result);
281
282 /* Find CCB based on CID */
283 p_bcb = bnepu_find_bcb_by_cid(l2cap_cid);
284 if (p_bcb == NULL) {
285 BNEP_TRACE_WARNING("BNEP - Rcvd L2CAP cfg ind, unknown CID: 0x%x",
286 l2cap_cid);
287 return;
288 }
289
290 /* For now, always accept configuration from the other side */
291 if (p_cfg->result == L2CAP_CFG_OK) {
292 p_bcb->con_flags |= BNEP_FLAGS_MY_CFG_DONE;
293
294 if (p_bcb->con_flags & BNEP_FLAGS_HIS_CFG_DONE) {
295 p_bcb->con_state = BNEP_STATE_SEC_CHECKING;
296
297 /* Start timer waiting for setup or response */
298 alarm_set_on_queue(p_bcb->conn_timer, BNEP_HOST_TIMEOUT_MS,
299 bnep_conn_timer_timeout, p_bcb,
300 btu_general_alarm_queue);
301
302 if (p_bcb->con_flags & BNEP_FLAGS_IS_ORIG) {
303 btm_sec_mx_access_request(p_bcb->rem_bda, BT_PSM_BNEP, true,
304 BTM_SEC_PROTO_BNEP,
305 bnep_get_uuid32(&(p_bcb->src_uuid)),
306 &bnep_sec_check_complete, p_bcb);
307 }
308 }
309 } else {
310 /* Tell the upper layer, if he has a callback */
311 if ((p_bcb->con_flags & BNEP_FLAGS_IS_ORIG) && (bnep_cb.p_conn_state_cb)) {
312 (*bnep_cb.p_conn_state_cb)(p_bcb->handle, p_bcb->rem_bda,
313 BNEP_CONN_FAILED_CFG, false);
314 }
315
316 L2CA_DisconnectReq(p_bcb->l2cap_cid);
317
318 bnepu_release_bcb(p_bcb);
319 }
320 }
321
322 /*******************************************************************************
323 *
324 * Function bnep_disconnect_ind
325 *
326 * Description This function handles a disconnect event from L2CAP. If
327 * requested to, we ack the disconnect before dropping the CCB
328 *
329 * Returns void
330 *
331 ******************************************************************************/
bnep_disconnect_ind(uint16_t l2cap_cid,bool ack_needed)332 static void bnep_disconnect_ind(uint16_t l2cap_cid, bool ack_needed) {
333 tBNEP_CONN* p_bcb;
334
335 if (ack_needed) L2CA_DisconnectRsp(l2cap_cid);
336
337 /* Find CCB based on CID */
338 p_bcb = bnepu_find_bcb_by_cid(l2cap_cid);
339 if (p_bcb == NULL) {
340 BNEP_TRACE_WARNING("BNEP - Rcvd L2CAP disc, unknown CID: 0x%x", l2cap_cid);
341 return;
342 }
343
344 BNEP_TRACE_EVENT("BNEP - Rcvd L2CAP disc, CID: 0x%x", l2cap_cid);
345
346 /* Tell the user if he has a callback */
347 if (p_bcb->con_state == BNEP_STATE_CONNECTED) {
348 if (bnep_cb.p_conn_state_cb)
349 (*bnep_cb.p_conn_state_cb)(p_bcb->handle, p_bcb->rem_bda,
350 BNEP_CONN_DISCONNECTED, false);
351 } else {
352 if ((bnep_cb.p_conn_state_cb) &&
353 ((p_bcb->con_flags & BNEP_FLAGS_IS_ORIG) ||
354 (p_bcb->con_flags & BNEP_FLAGS_CONN_COMPLETED)))
355 (*bnep_cb.p_conn_state_cb)(p_bcb->handle, p_bcb->rem_bda,
356 BNEP_CONN_FAILED, false);
357 }
358
359 bnepu_release_bcb(p_bcb);
360 }
361
362 /*******************************************************************************
363 *
364 * Function bnep_disconnect_cfm
365 *
366 * Description This function gets the disconnect confirm event from L2CAP
367 *
368 * Returns void
369 *
370 ******************************************************************************/
bnep_disconnect_cfm(uint16_t l2cap_cid,uint16_t result)371 static void bnep_disconnect_cfm(uint16_t l2cap_cid, uint16_t result) {
372 BNEP_TRACE_EVENT("BNEP - Rcvd L2CAP disc cfm, CID: 0x%x, Result 0x%x",
373 l2cap_cid, result);
374 }
375
376 /*******************************************************************************
377 *
378 * Function bnep_congestion_ind
379 *
380 * Description This is a callback function called by L2CAP when
381 * congestion status changes
382 *
383 ******************************************************************************/
bnep_congestion_ind(uint16_t l2cap_cid,bool is_congested)384 static void bnep_congestion_ind(uint16_t l2cap_cid, bool is_congested) {
385 tBNEP_CONN* p_bcb;
386
387 /* Find BCB based on CID */
388 p_bcb = bnepu_find_bcb_by_cid(l2cap_cid);
389 if (p_bcb == NULL) {
390 BNEP_TRACE_WARNING("BNEP - Rcvd L2CAP cong, unknown CID: 0x%x", l2cap_cid);
391 return;
392 }
393
394 if (is_congested) {
395 p_bcb->con_flags |= BNEP_FLAGS_L2CAP_CONGESTED;
396 if (bnep_cb.p_tx_data_flow_cb) {
397 bnep_cb.p_tx_data_flow_cb(p_bcb->handle, BNEP_TX_FLOW_OFF);
398 }
399 } else {
400 p_bcb->con_flags &= ~BNEP_FLAGS_L2CAP_CONGESTED;
401
402 if (bnep_cb.p_tx_data_flow_cb) {
403 bnep_cb.p_tx_data_flow_cb(p_bcb->handle, BNEP_TX_FLOW_ON);
404 }
405
406 /* While not congested, send as many buffers as we can */
407 while (!(p_bcb->con_flags & BNEP_FLAGS_L2CAP_CONGESTED)) {
408 BT_HDR* p_buf = (BT_HDR*)fixed_queue_try_dequeue(p_bcb->xmit_q);
409
410 if (!p_buf) break;
411
412 L2CA_DataWrite(l2cap_cid, p_buf);
413 }
414 }
415 }
416
417 /*******************************************************************************
418 *
419 * Function bnep_data_ind
420 *
421 * Description This function is called when data is received from L2CAP.
422 * if we are the originator of the connection, we are the SDP
423 * client, and the received message is queued for the client.
424 *
425 * If we are the destination of the connection, we are the SDP
426 * server, so the message is passed to the server processing
427 * function.
428 *
429 * Returns void
430 *
431 ******************************************************************************/
bnep_data_ind(uint16_t l2cap_cid,BT_HDR * p_buf)432 static void bnep_data_ind(uint16_t l2cap_cid, BT_HDR* p_buf) {
433 tBNEP_CONN* p_bcb;
434 uint8_t* p = (uint8_t*)(p_buf + 1) + p_buf->offset;
435 uint16_t rem_len = p_buf->len;
436 uint8_t type, ctrl_type, ext_type = 0;
437 bool extension_present, fw_ext_present;
438 uint16_t protocol = 0;
439 uint8_t *p_src_addr, *p_dst_addr;
440
441 /* Find CCB based on CID */
442 p_bcb = bnepu_find_bcb_by_cid(l2cap_cid);
443 if (p_bcb == NULL) {
444 BNEP_TRACE_WARNING("BNEP - Rcvd L2CAP data, unknown CID: 0x%x", l2cap_cid);
445 osi_free(p_buf);
446 return;
447 }
448
449 /* Get the type and extension bits */
450 type = *p++;
451 extension_present = type >> 7;
452 type &= 0x7f;
453 if ((rem_len <= bnep_frame_hdr_sizes[type]) || (rem_len > BNEP_MTU_SIZE)) {
454 BNEP_TRACE_EVENT("BNEP - rcvd frame, bad len: %d type: 0x%02x", p_buf->len,
455 type);
456 osi_free(p_buf);
457 return;
458 }
459
460 rem_len--;
461
462 if ((p_bcb->con_state != BNEP_STATE_CONNECTED) &&
463 (!(p_bcb->con_flags & BNEP_FLAGS_CONN_COMPLETED)) &&
464 (type != BNEP_FRAME_CONTROL)) {
465 BNEP_TRACE_WARNING(
466 "BNEP - Ignored L2CAP data while in state: %d, CID: 0x%x",
467 p_bcb->con_state, l2cap_cid);
468
469 if (extension_present) {
470 /*
471 ** When there is no connection if a data packet is received
472 ** with unknown control extension headers then those should be processed
473 ** according to complain/ignore law
474 */
475 uint8_t ext, length;
476 uint16_t org_len, new_len;
477 /* parse the extension headers and process unknown control headers */
478 org_len = rem_len;
479 new_len = 0;
480 do {
481 ext = *p++;
482 length = *p++;
483 p += length;
484
485 if ((!(ext & 0x7F)) && (*p > BNEP_FILTER_MULTI_ADDR_RESPONSE_MSG))
486 bnep_send_command_not_understood(p_bcb, *p);
487
488 new_len += (length + 2);
489
490 if (new_len > org_len) break;
491
492 } while (ext & 0x80);
493 }
494
495 osi_free(p_buf);
496 return;
497 }
498
499 if (type > BNEP_FRAME_COMPRESSED_ETHERNET_DEST_ONLY) {
500 BNEP_TRACE_EVENT("BNEP - rcvd frame, unknown type: 0x%02x", type);
501 osi_free(p_buf);
502 return;
503 }
504
505 BNEP_TRACE_DEBUG("BNEP - rcv frame, type: %d len: %d Ext: %d", type,
506 p_buf->len, extension_present);
507
508 /* Initialize addresses to 'not supplied' */
509 p_src_addr = p_dst_addr = NULL;
510
511 switch (type) {
512 case BNEP_FRAME_GENERAL_ETHERNET:
513 p_dst_addr = p;
514 p += BD_ADDR_LEN;
515 p_src_addr = p;
516 p += BD_ADDR_LEN;
517 BE_STREAM_TO_UINT16(protocol, p);
518 rem_len -= 14;
519 break;
520
521 case BNEP_FRAME_CONTROL:
522 ctrl_type = *p;
523 p = bnep_process_control_packet(p_bcb, p, &rem_len, false);
524
525 if (ctrl_type == BNEP_SETUP_CONNECTION_REQUEST_MSG &&
526 p_bcb->con_state != BNEP_STATE_CONNECTED && extension_present && p &&
527 rem_len) {
528 osi_free(p_bcb->p_pending_data);
529 p_bcb->p_pending_data = (BT_HDR*)osi_malloc(rem_len + sizeof(BT_HDR));
530 memcpy((uint8_t*)(p_bcb->p_pending_data + 1), p, rem_len);
531 p_bcb->p_pending_data->len = rem_len;
532 p_bcb->p_pending_data->offset = 0;
533 } else {
534 while (extension_present && p && rem_len) {
535 ext_type = *p++;
536 extension_present = ext_type >> 7;
537 ext_type &= 0x7F;
538
539 /* if unknown extension present stop processing */
540 if (ext_type) break;
541
542 p = bnep_process_control_packet(p_bcb, p, &rem_len, true);
543 }
544 }
545 osi_free(p_buf);
546 return;
547
548 case BNEP_FRAME_COMPRESSED_ETHERNET:
549 BE_STREAM_TO_UINT16(protocol, p);
550 rem_len -= 2;
551 break;
552
553 case BNEP_FRAME_COMPRESSED_ETHERNET_SRC_ONLY:
554 p_src_addr = p;
555 p += BD_ADDR_LEN;
556 BE_STREAM_TO_UINT16(protocol, p);
557 rem_len -= 8;
558 break;
559
560 case BNEP_FRAME_COMPRESSED_ETHERNET_DEST_ONLY:
561 p_dst_addr = p;
562 p += BD_ADDR_LEN;
563 BE_STREAM_TO_UINT16(protocol, p);
564 rem_len -= 8;
565 break;
566 }
567
568 /* Process the header extension if there is one */
569 while (extension_present && p && rem_len) {
570 ext_type = *p;
571 extension_present = ext_type >> 7;
572 ext_type &= 0x7F;
573
574 /* if unknown extension present stop processing */
575 if (ext_type) {
576 BNEP_TRACE_EVENT("Data extension type 0x%x found", ext_type);
577 break;
578 }
579
580 p++;
581 rem_len--;
582 p = bnep_process_control_packet(p_bcb, p, &rem_len, true);
583 }
584
585 p_buf->offset += p_buf->len - rem_len;
586 p_buf->len = rem_len;
587
588 /* Always give the upper layer MAC addresses */
589 if (!p_src_addr) p_src_addr = (uint8_t*)p_bcb->rem_bda;
590
591 if (!p_dst_addr)
592 p_dst_addr = (uint8_t*)controller_get_interface()->get_address();
593
594 /* check whether there are any extensions to be forwarded */
595 if (ext_type)
596 fw_ext_present = true;
597 else
598 fw_ext_present = false;
599
600 if (bnep_cb.p_data_buf_cb) {
601 (*bnep_cb.p_data_buf_cb)(p_bcb->handle, p_src_addr, p_dst_addr, protocol,
602 p_buf, fw_ext_present);
603 } else if (bnep_cb.p_data_ind_cb) {
604 (*bnep_cb.p_data_ind_cb)(p_bcb->handle, p_src_addr, p_dst_addr, protocol, p,
605 rem_len, fw_ext_present);
606 osi_free(p_buf);
607 }
608 }
609
610 /*******************************************************************************
611 *
612 * Function bnep_conn_timer_timeout
613 *
614 * Description This function processes a timeout. If it is a startup
615 * timeout, we check for reading our BD address. If it
616 * is an L2CAP timeout, we send a disconnect req to L2CAP.
617 *
618 * Returns void
619 *
620 ******************************************************************************/
bnep_conn_timer_timeout(void * data)621 void bnep_conn_timer_timeout(void* data) {
622 tBNEP_CONN* p_bcb = (tBNEP_CONN*)data;
623
624 BNEP_TRACE_EVENT(
625 "BNEP - CCB timeout in state: %d CID: 0x%x flags %x, re_transmit %d",
626 p_bcb->con_state, p_bcb->l2cap_cid, p_bcb->con_flags,
627 p_bcb->re_transmits);
628
629 if (p_bcb->con_state == BNEP_STATE_CONN_SETUP) {
630 BNEP_TRACE_EVENT("BNEP - CCB timeout in state: %d CID: 0x%x",
631 p_bcb->con_state, p_bcb->l2cap_cid);
632
633 if (!(p_bcb->con_flags & BNEP_FLAGS_IS_ORIG)) {
634 L2CA_DisconnectReq(p_bcb->l2cap_cid);
635
636 bnepu_release_bcb(p_bcb);
637 return;
638 }
639
640 if (p_bcb->re_transmits++ != BNEP_MAX_RETRANSMITS) {
641 bnep_send_conn_req(p_bcb);
642 alarm_set_on_queue(p_bcb->conn_timer, BNEP_CONN_TIMEOUT_MS,
643 bnep_conn_timer_timeout, p_bcb,
644 btu_general_alarm_queue);
645 } else {
646 L2CA_DisconnectReq(p_bcb->l2cap_cid);
647
648 if ((p_bcb->con_flags & BNEP_FLAGS_IS_ORIG) && (bnep_cb.p_conn_state_cb))
649 (*bnep_cb.p_conn_state_cb)(p_bcb->handle, p_bcb->rem_bda,
650 BNEP_CONN_FAILED, false);
651
652 bnepu_release_bcb(p_bcb);
653 return;
654 }
655 } else if (p_bcb->con_state != BNEP_STATE_CONNECTED) {
656 BNEP_TRACE_EVENT("BNEP - CCB timeout in state: %d CID: 0x%x",
657 p_bcb->con_state, p_bcb->l2cap_cid);
658
659 L2CA_DisconnectReq(p_bcb->l2cap_cid);
660
661 /* Tell the user if he has a callback */
662 if ((p_bcb->con_flags & BNEP_FLAGS_IS_ORIG) && (bnep_cb.p_conn_state_cb))
663 (*bnep_cb.p_conn_state_cb)(p_bcb->handle, p_bcb->rem_bda,
664 BNEP_CONN_FAILED, false);
665
666 bnepu_release_bcb(p_bcb);
667 } else if (p_bcb->con_flags & BNEP_FLAGS_FILTER_RESP_PEND) {
668 if (p_bcb->re_transmits++ != BNEP_MAX_RETRANSMITS) {
669 bnepu_send_peer_our_filters(p_bcb);
670 alarm_set_on_queue(p_bcb->conn_timer, BNEP_FILTER_SET_TIMEOUT_MS,
671 bnep_conn_timer_timeout, p_bcb,
672 btu_general_alarm_queue);
673 } else {
674 L2CA_DisconnectReq(p_bcb->l2cap_cid);
675
676 /* Tell the user if he has a callback */
677 if (bnep_cb.p_conn_state_cb)
678 (*bnep_cb.p_conn_state_cb)(p_bcb->handle, p_bcb->rem_bda,
679 BNEP_SET_FILTER_FAIL, false);
680
681 bnepu_release_bcb(p_bcb);
682 return;
683 }
684 } else if (p_bcb->con_flags & BNEP_FLAGS_MULTI_RESP_PEND) {
685 if (p_bcb->re_transmits++ != BNEP_MAX_RETRANSMITS) {
686 bnepu_send_peer_our_multi_filters(p_bcb);
687 alarm_set_on_queue(p_bcb->conn_timer, BNEP_FILTER_SET_TIMEOUT_MS,
688 bnep_conn_timer_timeout, p_bcb,
689 btu_general_alarm_queue);
690 } else {
691 L2CA_DisconnectReq(p_bcb->l2cap_cid);
692
693 /* Tell the user if he has a callback */
694 if (bnep_cb.p_conn_state_cb)
695 (*bnep_cb.p_conn_state_cb)(p_bcb->handle, p_bcb->rem_bda,
696 BNEP_SET_FILTER_FAIL, false);
697
698 bnepu_release_bcb(p_bcb);
699 return;
700 }
701 }
702 }
703
704 /*******************************************************************************
705 *
706 * Function bnep_connected
707 *
708 * Description This function is called when a connection is established
709 * (after config).
710 *
711 * Returns void
712 *
713 ******************************************************************************/
bnep_connected(tBNEP_CONN * p_bcb)714 void bnep_connected(tBNEP_CONN* p_bcb) {
715 bool is_role_change;
716
717 if (p_bcb->con_flags & BNEP_FLAGS_CONN_COMPLETED)
718 is_role_change = true;
719 else
720 is_role_change = false;
721
722 p_bcb->con_state = BNEP_STATE_CONNECTED;
723 p_bcb->con_flags |= BNEP_FLAGS_CONN_COMPLETED;
724 p_bcb->con_flags &= (~BNEP_FLAGS_SETUP_RCVD);
725
726 /* Ensure timer is stopped */
727 alarm_cancel(p_bcb->conn_timer);
728 p_bcb->re_transmits = 0;
729
730 /* Tell the upper layer, if he has a callback */
731 if (bnep_cb.p_conn_state_cb)
732 (*bnep_cb.p_conn_state_cb)(p_bcb->handle, p_bcb->rem_bda, BNEP_SUCCESS,
733 is_role_change);
734 }
735